Moving Materials in and Out of Cells

What does it mean when we say that the cell membrane is selectively permeable?

• It allows everything to pass through

• It allows only some things to pass through

What is the main way that small molecules move across the cell membrane?

• Facilitated diffusion

• Diffusion

What is the process of diffusion caused by?

• Molecules repelling each other

• Molecules bumping into each other and moving away

What is the diffusion of water molecules through the membrane called?

• Osmosis

• Facilitated diffusion

What is the movement of materials through a cell membrane without using the cell's energy called?

• Endocytosis

• Passive transport

What is the movement of materials through the cell membrane using the cell's energy called?

• Active transport

• Endocytosis

Which method of active transport involves the cell membrane surrounding and enclosing on a particle?

• Transport by Engulfing

• Facilitated diffusion

What is used for active transport to 'pick up' molecules outside the cell and carry them inside the cell?

• Endocytosis

• Transport Proteins

Which type of transport goes from low concentration to a higher concentration without needing energy?

• Diffusion

• Facilitated diffusion

Which type of transport goes from high concentration to a lower concentration without needing energy?

• Passive transport

• Active transport